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NEET2023PhysicsGravitationActual

The escape velocity of a body on the earth surface is 11.2 ~km / s . If the same body is projected upward with velocity 22.4 ~km / s , the velocity of this body at infinite distance from the centre of the earth will be

Options

  1. A11.2 ~km / s
  2. B11.2 3 ~km / s
  3. C11.2 2 ~km / s
  4. DZero

Correct answer

B. 11.2 3 ~km / s

Step-by-step solution

aligned & V^ 2 =V^2-V e^2 & V^ = V^2-V e^2 & = (22.4)^2-(11.2)^2 & V^ =11.2 3 ~km / s aligned

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